After you glue up a bunch of matched shells, use those rubber bands to bind them together. Gorilla Glue will stick a little bit on the rubber bands, but it usually comes right off. Here are a bunch of them bound, and then ready to make a cultch:
Starting a cultch, gluing matched sets of shells together...I love when there are barnacles and remnants of other invertebrates on these shells, gives it a realistic look:
